Best Regional Plants
| Plant Name | Genus | Award | Trial | Region | Year | Trial Cold Hardiness | Trial Heat Zone |
|---|---|---|---|---|---|---|---|
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Mississippi State University - Crystal Springs | Southeast | 2004 | 7b | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Mississippi State University - Crystal Springs | Southeast | 2004 | 7b | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Mississippi State University - Crystal Springs | Southeast | 2004 | 7b | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Arboretum Approved | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Arboretum Approved | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Arboretum Approved | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Arboretum Approved | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Flame Proof | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Flame Proof | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Flame Proof | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Flame Proof | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | North Texas Winners Circle | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | North Texas Winners Circle | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | North Texas Winners Circle | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | North Texas Winners Circle | Dallas Arboretum | Southwest | 2004 | 8a | 9 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Sawaya Garden Trial | Canada | |||
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Sawaya Garden Trial | Canada | |||
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Sawaya Garden Trial | Canada | |||
| Diamond Mountain® Euphorbia hybrid | Euphorbia | Top Performer | University of Guelph | Canada | 2018 | ||
| Diamond Mountain® Euphorbia hybrid | Euphorbia | Top Performer | South Dakota State - McCrory Gardens | Midwest | 2018 |
4a 4b |
